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(1/2)*x-6 = 93/2-7*x // - 93/2-7*x
(1/2)*x-(-7*x)-(93/2)-6 = 0
(1/2)*x+7*x-93/2-6 = 0
15/2*x-105/2 = 0 // + 105/2
15/2*x = 105/2 // : 15/2
x = 105/2/15/2
x = 7
x = 7
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